.container {
  position: relative;
}

.operation {
  position: absolute;
  right: 0;
  top: calc(50% - 100px);

  .button {
    user-select: none;
    width: 60px;
    text-align: center;
    line-height: 30px;
    background-color: rgba(256, 256, 256, .6);
    cursor: pointer;
  }
}